Ruth Miller, 40, is charged with two counts of aggravated murder, two counts of domestic violence, and one count of child endangerment after the troubling chain of events at Atwood Lake.

Edward and Stephania Andrews disappeared on May 15, 1970, while driving home in their Oldsmobile from a cocktail party at the Sheraton Hotel in downtown Chicago.

Police were called to the 7-Eleven on Sunday after an employee recognized that a woman was tucking her thumb under her four fingers.